On 26/05/2015 14:33, Alexey Kardashevskiy wrote: > >>>> If it's not true now that they can be unparented at any time like >>>> alias regions, we should probably try to make it true. >>> >>> Unfortunately it's not so easy... > > > Uff. Tricky :) > > memory_region_del_subregion() is not unparenting but just a wrapped > object_unref(), right?
Right. The problematic thing to do is explicit object_unparent followed by one of the following: 1) memory_region_init for the same memory region that has been unparented 2) g_free of some dynamically-allocated data structure that contained the memory region. > But since iommu MR are resolved dynamically, the > whole conversation we are having here now has nothing to do with my&Mike > concern what we can and cannot do with DMA windows here. Is this correct? I don't understand what you're asking here, sorry. Paolo
